Pollution , climate changes, over - exploitation by human etc are responsible for changes in the ecosystem . Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surrounding . So it is important to conservation by which we can conserve our biodiversity .
Protected areas are example of .

Options

A. In - situ conservation
B. Ex-situ conservation
C. Cryopreservation
D. Green houses.

Explanation

To answer the question regarding the examples of protected areas related to biodiversity conservation, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question highlights the impact of pollution, climate change, and human activities on ecosystems and biodiversity. It emphasizes the importance of conservation methods to protect biodiversity.

2. **Identifying Protected Areas**: The question asks for examples of protected areas, which are regions designated for the conservation of biodiversity.

3. **Exploring In-situ Conservation**:
- In-situ conservation refers to the conservation of species in their natural habitats. This means protecting ecosystems and the species that live within them.
- Protected areas under in-situ conservation include national parks, wildlife reserves, and natural habitats where species can thrive without human interference.

4. **Exploring Ex-situ Conservation**:
- Ex-situ conservation involves the preservation of species outside their natural habitats. This includes zoos, botanical gardens, and seed banks.
- While important, ex-situ conservation does not qualify as a protected area in the same sense as in-situ conservation.

5. **Understanding Other Options**:
- **Cryopreservation**: This is a method of preserving cells and tissues at very low temperatures. It is not a protected area.
- **Greenhouses**: These are structures for growing plants under controlled conditions and do not serve as protected areas for biodiversity.

6. **Conclusion**: Based on the definitions and examples discussed, the correct answer to the question is that protected areas are primarily represented by in-situ conservation.

### Final Answer:
Protected areas are examples of **in-situ conservation**.

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